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authorPaolo Abeni <pabeni@redhat.com>2019-02-07 14:13:18 +0100
committerDavid S. Miller <davem@davemloft.net>2019-02-08 22:32:05 -0800
commit225d9464268599a5b4d094d02ec17808e44c7553 (patch)
treeafec17ea479f9b610d7c8ac6cf0032d7f9a234a8 /net
parentc09551c6ff7fe16a79a42133bcecba5fc2fc3291 (diff)
downloadlinux-225d9464268599a5b4d094d02ec17808e44c7553.tar.bz2
vsock: cope with memory allocation failure at socket creation time
In the unlikely event that the kmalloc call in vmci_transport_socket_init() fails, we end-up calling vmci_transport_destruct() with a NULL vmci_trans() and oopsing. This change addresses the above explicitly checking for zero vmci_trans() at destruction time. Reported-by: Xiumei Mu <xmu@redhat.com> Fixes: d021c344051a ("VSOCK: Introduce VM Sockets") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/vmw_vsock/vmci_transport.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index c361ce782412..c3d5ab01fba7 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1651,6 +1651,10 @@ static void vmci_transport_cleanup(struct work_struct *work)
static void vmci_transport_destruct(struct vsock_sock *vsk)
{
+ /* transport can be NULL if we hit a failure at init() time */
+ if (!vmci_trans(vsk))
+ return;
+
/* Ensure that the detach callback doesn't use the sk/vsk
* we are about to destruct.
*/